51 lines
1.1 KiB
C++
51 lines
1.1 KiB
C++
// Toggles the built-in LED when the built in button
|
|
// on the Maple is pushed in. This uses the attachInterrupt function to
|
|
// setup the interrupt handler for the button being pressed.
|
|
//
|
|
// More about attachInterrupt:
|
|
// http://leaflabs.com/docs/lang/api/attachinterrupt.html
|
|
//
|
|
|
|
#include <wirish/wirish.h>
|
|
|
|
// LED is off by default
|
|
bool isLEDOn = false;
|
|
|
|
// Interrupt handler takes in nothing and returns nothing.
|
|
void interruptHandler() {
|
|
// Set LED
|
|
isLEDOn = !isLEDOn;
|
|
digitalWrite(BOARD_LED_PIN, isLEDOn);
|
|
|
|
// Delay slightly for switch debouncing.
|
|
delay(20);
|
|
}
|
|
|
|
// Setup pin modes and the interrupt handler
|
|
void setup() {
|
|
pinMode(BOARD_BUTTON_PIN, INPUT);
|
|
pinMode(BOARD_LED_PIN, OUTPUT);
|
|
|
|
attachInterrupt(BOARD_BUTTON_PIN, interruptHandler, RISING);
|
|
}
|
|
|
|
// Loop. Does nothing in this example.
|
|
void loop() {
|
|
|
|
}
|
|
|
|
// Force init to be called *first*, i.e. before static object allocation.
|
|
// Otherwise, statically allocated objects that need libmaple may fail.
|
|
__attribute__((constructor)) void premain() {
|
|
init();
|
|
}
|
|
|
|
int main(void) {
|
|
setup();
|
|
|
|
while (true) {
|
|
loop();
|
|
}
|
|
return 0;
|
|
}
|